On 2014 Mar 12, Allison Stelling commented:
While SERS gives an advantage in depth penetration, I would be more comfortable with not using any labels in medical diagnostics. Raman spectroscopy can be done without needing any nanoparticles. For a newer study that uses Raman and florescence to do non-invasive, non-destructive tumor border margin assessment on-line during surgeries, see Kong K, 2013.
As to the depth penetration, spatially offset Raman studies are being done that address this question. Labels and dyes may always have a place at the diagnostic table- however, I think they should be a last resort after less expensive and invasive tests; for a review see: Matousek P, 2013.
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